Make it personal ("you're a dick"), and there ain't no conversation to be had — even though I try.
Ohmahgod, the comedy.
Only FirebrandRoaring would start a conversation saying that he's going to be a dick (i.e. literally, "May I be a dick?"), and then take offense when someone says, "Yeah, you're being a dick. I don't talk to people like you." geee-ZUSS!